2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // PROCLN.C - Line Processing
4 // Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source Utilised with the Kind Permission of Landon Dyer
21 #define DEF_KW // Declare keyword values
22 #include "kwtab.h" // Incl generated keyword tables & defs
24 #define DEF_MN // Incl 68k keyword definitions
25 #define DECL_MN // Incl 68k keyword state machine tables
33 IFENT * ifent; // Current ifent
34 static IFENT ifent0; // Root ifent
35 static IFENT * f_ifent; // Freelist of ifents
36 static int disabled; // Assembly conditionally disabled
37 int just_bss; // 1, ds.b in microprocessor mode
38 VALUE pcloc; // Value of "PC" at beginning of line
39 IFENT * ifent; // Current ifent
40 SYM * lab_sym; // Label on line (or NULL)
42 const char extra_stuff[] = "extra (unexpected) text found after addressing mode";
43 const char comma_error[] = "missing comma";
44 const char syntax_error[] = "syntax error";
45 const char locgl_error[] = "cannot GLOBL local symbol";
46 const char lab_ignored[] = "label ignored";
48 // Table to convert an addressing-mode number to a bitmask.
49 LONG amsktab[0112] = {
50 M_DREG, M_DREG, M_DREG, M_DREG,
51 M_DREG, M_DREG, M_DREG, M_DREG,
53 M_AREG, M_AREG, M_AREG, M_AREG,
54 M_AREG, M_AREG, M_AREG, M_AREG,
56 M_AIND, M_AIND, M_AIND, M_AIND,
57 M_AIND, M_AIND, M_AIND, M_AIND,
59 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
60 M_APOSTINC, M_APOSTINC, M_APOSTINC, M_APOSTINC,
62 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
63 M_APREDEC, M_APREDEC, M_APREDEC, M_APREDEC,
65 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
66 M_ADISP, M_ADISP, M_ADISP, M_ADISP,
68 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
69 M_AINDEXED, M_AINDEXED, M_AINDEXED, M_AINDEXED,
93 // Initialize Line Processor
95 void InitLineProcessor(void)
99 f_ifent = ifent0.if_prev = NULL;
109 int state; // Keyword machine state (output)
110 int j; // Random int, must be fast
111 char * p; // Random char ptr, must be fast
112 TOKEN * tk; // First token in line
113 char * label; // Symbol (or NULL)
114 char * equate; // Symbol (or NULL)
115 int labtyp = 0; // Label type (':', DCOLON)
116 int equtyp = 0; // Equ type ('=', DEQUALS)
117 VALUE eval; // Expression value
118 WORD eattr; // Expression attributes
119 SYM * esym; // External symbol involved in expr.
120 WORD siz = 0; // Size suffix to mnem/diretve/macro
121 LONG amsk0, amsk1; // Address-type masks for ea0, ea1
122 MNTAB * m; // Code generation table pointer
123 SYM * sy, * sy2; // Symbol (temp usage)
124 char * opname = NULL; // Name of dirctve/mnemonic/macro
125 int listflag; // 0: Don't call listeol()
126 int as68mode = 0; // 1: Handle multiple labels
127 WORD rmask; // Register list, for REG
128 int registerbank; // RISC register bank
129 int riscreg; // RISC register
130 listflag = 0; // Initialise listing flag
132 loop: // Line processing loop label
134 // Get another line of tokens
135 if (TokenizeLine() == TKEOF)
137 if (verb_flag) printf("Assemble: Found TKEOF flag...\n");
138 if (list_flag && listflag) // Flush last line of source
141 if (ifent->if_prev != NULL) // Check conditional token
142 error("hit EOF without finding matching .endif");
147 DEBUG DumpTokenBuffer();
151 if (listflag && listing > 0)
152 listeol(); // Tell listing generator about EOL
154 lstout((char)(disabled ? '-' : lntag)); // Prepare new line for listing
155 listflag = 1; // OK to call `listeol' now
156 just_bss = 0; // Reset just_bss mode
159 state = -3; // No keyword (just EOL)
160 label = NULL; // No label
161 lab_sym = NULL; // No (exported) label
162 equate = NULL; // No equate
163 tk = tok; // Save first token in line
164 pcloc = (VALUE)sloc; // Set beginning-of-line PC
166 loop1: // Internal line processing loop
168 if (*tok == EOL) // Restart loop if end-of-line
171 // First token MUST be a symbol
174 // error(syntax_error);
175 error("syntax error; expected symbol");
179 j = (int)tok[2]; // Skip equates (normal statements)
181 if (j == '=' || j == DEQUALS || j == SET || j == REG || j == EQUREG || j == CCDEF)
183 equate = string[tok[1]];
189 // Skip past label (but record it)
190 if (j == ':' || j == DCOLON)
193 // label = (char *)tok[1]; // Get label name
194 label = string[tok[1]]; // Get label name
195 labtyp = tok[2]; // Get label type
196 tok += 3; // Go to next line token
198 // Handle multiple labels; if there's another label, go process it,
199 // and come back at `as68label' above.
204 if (*tok == SYMBOL && tok[2] == ':')
212 // EOL is legal here...
216 // Next token MUST be a symbol
217 if (*tok++ != SYMBOL)
219 // error(syntax_error);
220 error("syntax error; expected symbol");
224 // This is the problem here: On 64-bit platforms, this cuts the native pointer
225 // in half. We need to figure out how to fix this.
226 //#warning "!!! Bad pointer !!!"
228 opname = p = (char *)*tok++; // Store opcode name here
230 opname = p = string[*tok++];
233 // Check to see if the SYMBOL is a keyword (a mnemonic or directive).
234 // On output, `state' will have one of the values:
235 // -3 there was no symbol (EOL)
236 // -2..-1 the symbol didn't match any keyword
237 // 0..499 vanilla directives (dc, ds, etc.)
238 // 500..999 electric directives (macro, rept, etc.)
239 // 1000..+ mnemonics (move, lsr, etc.)
240 for(state=0; state>=0;)
242 j = mnbase[state] + (int)tolowertab[*p];
244 // Reject, character doesn't match
245 if (mncheck[j] != state)
247 state = -1; // No match
251 // Must accept or reject at EOS
254 state = mnaccept[j]; // (-1 on no terminal match)
261 // Check for ".b" ".w" ".l" after directive, macro or mnemonic.
266 else if (*tok == DOTL)
268 else if (*tok == DOTB)
271 // Do special directives (500..999) (These must be handled in "real time")
272 if (state >= 500 && state < 1000)
285 case MN_IIF: // .iif --- immediate if
286 if (disabled || expr(exprbuf, &eval, &eattr, &esym) != OK)
289 if (!(eattr & DEFINED))
305 case MN_MACRO: // .macro --- macro definition
315 case MN_EXITM: // .exitm --- exit macro
316 case MN_ENDM: // .endm --- same as .exitm
338 error("mis-nested .endr");
345 if (disabled) // Conditionally disabled code
351 // Pick global or local symbol enviroment
358 j = (*equate == '.' ? curenv : 0);
360 sy = lookup(equate, LABEL, j);
364 sy = NewSymbol(equate, LABEL, j);
367 if (equtyp == DEQUALS)
369 // Can't GLOBAL a local symbol
379 else if ((sy->sattr & DEFINED) && equtyp != SET)
381 if ((equtyp == EQUREG) && (sy->sattre & UNDEF_EQUR))
383 //REALLY? sy->sattre |= ~UNDEF_EQUR;
384 sy->sattre &= ~UNDEF_EQUR;
387 else if ((equtyp == CCDEF) && (sy->sattre & UNDEF_CC))
389 //REALLY? sy->sattre |= ~UNDEF_CC;
390 sy->sattre &= ~UNDEF_CC;
395 errors("multiple equate to '%s'", sy->sname);
400 // Put symbol in "order of definition" list
401 if (!(sy->sattr & SDECLLIST))
404 // Parse value to equate symbol to;
408 if (equtyp == EQUREG)
410 //Linko's request to issue a warning on labels that equated to the same register
411 //would go here. Not sure how to implement it though. :-/
414 have an array of bools with 64 entries. Whenever a register is equated, set the
415 corresponding register bool to true. Whenever it's undef'ed, set it to false. When
416 checking to see if it's already been equated, issue a warning.
418 // Check that we are in a RISC section
421 error(".equr/.regequ must be defined in .gpu/.dsp section");
425 // Check for register to equate to
426 if ((*tok >= KW_R0) && (*tok <= KW_R31))
428 sy->sattre = EQUATEDREG | RISCSYM; // Mark as equated register
429 riscreg = (*tok - KW_R0);
430 //is there any reason to do this, since we're putting this in svalue?
431 //i'm thinking, no. Let's test that out! :-D
432 // sy->sattre |= (riscreg << 8); // Store register number
433 //everything seems to build fine without it... We'll leave it here Just In Case(tm)
435 #define DEBODGE_REGBANK
436 #ifdef DEBODGE_REGBANK
437 // Default is current state of "regbank"
438 registerbank = regbank;
440 // Default is no register bank specified
441 registerbank = BANK_N;
444 // Check for ",<bank #>" override notation
445 if ((tok[1] == ',') && (tok[2] == CONST))
447 // Advance token pointer to the constant
450 // Anything other than a 0 or a 1 will result in "No Bank"
452 registerbank = BANK_0;
454 registerbank = BANK_1;
457 #ifdef DEBODGE_REGBANK
458 sy->sattre |= registerbank; // Store register bank
460 // What needs to happen here is to prime registerbank with regbank, then use
461 // registerbank down below for the bank marking.
462 #warning "!!! regbank <-> registerbank confusion here !!!"
463 // The question here is why, if we're allowed to override the ".regbankN" rules above,
464 // then why is it using the one set by the directive in the extended attributes and
465 // not in what ends up in symbol->svalue?
466 // ".regbankN" is not an original Madmac directive, so it's suspect
467 sy->sattre |= regbank; // Store register bank
469 eattr = ABS | DEFINED | GLOBAL;
470 // & what does this $80000080 constant mean???
471 // eval = 0x80000080 + (riscreg) + (registerbank << 8);
475 // Checking for a register symbol
476 else if (tok[0] == SYMBOL)
478 sy2 = lookup(string[tok[1]], LABEL, j);
480 // Make sure symbol is a valid equreg
481 if (!sy2 || !(sy2->sattre & EQUATEDREG))
483 error("invalid GPU/DSP .equr/.regequ definition");
488 eattr = ABS | DEFINED | GLOBAL; // Copy symbols attributes
489 sy->sattre = sy2->sattre;
490 eval = (sy2->svalue & 0xFFFFF0FF);
496 error("invalid GPU/DSP .equr/.regequ definition");
500 else if (equtyp == REG)
502 if (reglist(&rmask) < 0)
506 eattr = ABS | DEFINED;
508 else if (equtyp == CCDEF)
510 sy->sattre |= EQUATEDCC;
511 eattr = ABS | DEFINED | GLOBAL;
513 if (tok[0] == SYMBOL)
515 sy2 = lookup(string[tok[1]], LABEL, j);
517 if (!sy2 || !(sy2->sattre & EQUATEDCC))
519 error("invalid gpu/dsp .ccdef definition");
524 eattr = ABS | DEFINED | GLOBAL;
525 sy->sattre = sy2->sattre;
530 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
534 else if (*tok == SYMBOL)
536 sy2 = lookup(string[tok[1]], LABEL, j);
538 if (sy2 && (sy2->sattre & EQUATEDREG))
540 sy->stype = sy2->stype;
541 sy->sattr = sy2->sattr;
542 sy->sattre = sy2->sattre;
543 //ICK sy->svalue = (sy2->svalue & 0xFFFFF0FF);
544 sy->svalue = sy2->svalue;
547 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
550 else if (expr(exprbuf, &eval, &eattr, &esym) != OK)
553 if (!(eattr & DEFINED))
559 sy->sattr |= eattr | EQUATED; // Symbol inherits value and attributes
562 if (list_flag) // Put value in listing
565 at_eol(); // Must be at EOL now
573 // Check for dot in front of label; means this is a local label if present
574 j = (*label == '.' ? curenv : 0);
575 sy = lookup(label, LABEL, j);
579 sy = NewSymbol(label, LABEL, j);
581 sy->sattre = RISCSYM;
583 else if (sy->sattr & DEFINED)
585 errors("multiply-defined label '%s'", label);
589 // Put symbol in "order of definition" list
590 if (!(sy->sattr & SDECLLIST))
595 sy->svalue = orgaddr;
596 sy->sattr |= ABS | DEFINED | EQUATED;
601 sy->sattr |= DEFINED | cursect;
610 if (labtyp == DCOLON)
621 // If we're in as68 mode, and there's another label, go back and handle it
622 if (as68_flag && as68mode)
630 // If we are in GPU or DSP mode and still in need of a mnemonic then search
632 if ((rgpu || rdsp) && (state < 0 || state >= 1000))
634 for(state=0, p=opname; state>=0;)
636 j = mrbase[state] + (int)tolowertab[*p];
638 // Reject, character doesn't match
639 if (mrcheck[j] != state)
641 state = -1; // No match
645 // Must accept or reject at EOS
648 state = mraccept[j]; // (-1 on no terminal match)
655 // Call RISC code generator if we found a mnemonic
658 GenerateRISCCode(state);
663 // Invoke macro or complain about bad mnemonic
666 if ((sy = lookup(opname, MACRO, 0)) != NULL)
667 InvokeMacro(sy, siz);
669 errors("unknown op '%s'", opname);
674 // Call directive handlers
677 (*dirtab[state])(siz);
682 // o can't deposit instrs in BSS or ABS
683 // o do automatic .EVEN for instrs
684 // o allocate space for largest possible instr
685 // o can't do ".b" operations with an address register
688 error("cannot initialize non-storage (BSS) section");
692 if (sloc & 1) // Automatic .even
695 if (challoc - ch_size < 18) // Make sure have space in current chunk
698 m = &machtab[state - 1000];
700 // Call special-mode handler
701 if (m->mnattr & CGSPECIAL)
703 (*m->mnfunc)(m->mninst, siz);
707 if (amode(1) < 0) // Parse 0, 1 or 2 addr modes
713 amsk0 = amsktab[am0];
714 amsk1 = amsktab[am1];
716 // Catch attempts to use ".B" with an address register (yes, this check
717 // does work at this level)
718 if (siz == SIZB && (am0 == AREG || am1 == AREG))
720 error("cannot use '.b' with an address register");
726 if ((m->mnattr & siz) && (amsk0 & m->mn0) != 0 && (amsk1 & m->mn1) != 0)
728 (*m->mnfunc)(m->mninst, siz);
732 m = &machtab[m->mncont];
738 // .if, Start Conditional Assembly
748 if ((rif = f_ifent) == NULL)
749 rif = (IFENT *)malloc(sizeof(IFENT));
751 f_ifent = rif->if_prev;
753 rif->if_prev = ifent;
758 if (expr(exprbuf, &eval, &eattr, &esym) != OK)
761 if ((eattr & DEFINED) == 0)
762 return error(undef_error);
767 rif->if_state = (WORD)disabled;
773 // .else, Do Alternate Case For .if
779 if (rif->if_prev == NULL)
780 return error("mismatched .else");
783 disabled = rif->if_prev->if_state;
787 rif->if_state = (WORD)disabled;
793 // .endif, End of conditional assembly block
794 // This is also called by fpop() to pop levels of IFENTs in case a macro or
795 // include file exits early with `exitm' or `end'.
801 if (rif->if_prev == NULL)
802 return error("mismatched .endif");
804 ifent = rif->if_prev;
805 disabled = rif->if_prev->if_state;
806 rif->if_prev = f_ifent;